PRS-7910
PRS-7910 57
Figure 11.7.2 Ground strip and termination
11.7.5 Guidelines for Wiring
There are several types of cables that are used in the connection of this relay: braided copper
cable, serial communication cable etc. Recommendation of each cable:
Grounding: braided copper cable, 2.5mm2 ~ 6.0mm2
Power supply, binary inputs & outputs: stranded conductor, 1.0mm2 ~ 2.5mm2
AC voltage inputs: stranded conductor, 1.5mm2
AC current inputs: stranded conductor, 2.5mm2 ~ 4.0mm2. If the 4.0mm2 lead is selected,
only the dedicated terminal cable lug provided by SUNRI can be adopted.
Serial communication: 4-core shielded braided cable
Ethernet communication: 4-pair screened twisted category 5E cable
11.7.6 Wiring for Electrical Cables
A female connector is used for connecting the wires with it, and then a female connector plugs into
a corresponding male connector that is in the front of one board.
DANGER!
NEVER allow the current transformer (CT) secondary circuit connected to this
equipment to be opened while the primary system is live. Opening the CT circuit will
produce a dangerously high voltage.
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